Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebadc20e00f2312a…

MALICIOUS

PDF

90.2 KB Created: 2020-11-24 13:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c4bd4388725d81cdb8f53f32e06ce696 SHA-1: 1d0c168d35e49e3d3b7191d470230f9d466a19e5 SHA-256: ebadc20e00f2312afc62c5901950094e69b7df3ce8b23e80564fa287e09fadf0
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document contains a large number of links to external PDF files hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of numerous external links and the ClamAV detection indicate a high likelihood of malicious intent, possibly to distribute further payloads or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/123?utm_term=descargar+musica+de+raulin+rodriguez+dame+tu+querer In PDF document text
    • https://tenasedoba.weebly.com/uploads/1/3/4/3/134333827/fuvosijilitaxexadol.pdfIn PDF document text
    • https://sigokati.weebly.com/uploads/1/3/4/4/134488660/6d178b9c23.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/900b0.pdfIn PDF document text
    • https://budaxopam.weebly.com/uploads/1/3/4/7/134711784/pamusuwapajeva_jiwowaleseb_pumozeduge_wepaw.pdfIn PDF document text
    • https://guzaluvezitalil.weebly.com/uploads/1/3/4/6/134645516/598758.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/2771932.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/nakipigakazus-xufozafi-gafigotuk-fuxojo.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/beregadateweto.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/8363686.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vobuturinivi/guess_the_picture_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/1971845599.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000e47c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE47C 14580 bytes
SHA-256: af14a0eec62166dd9e2a47128ab860c56a93c3aaeddac4eaad4d60ac0a2c76e0
font_00_sfnt_off0000bfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA4 5316 bytes
SHA-256: 5f9bb7c0dced3211fae512a286ac27f3bb1a652c4b9c8f9c7f0ee3ee3d4314d6
font_01_sfnt_off0000d18c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD18C 5328 bytes
SHA-256: a775ffc3773d7c1599480ece8cc110e0f239f9bdf24f34dcc446d55fd2ee20f3
font_03_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 11844 bytes
SHA-256: 88733147f3321d5d6a05d67ef584f385eae8f1c453524d0c4a5326787fc68153
font_04_sfnt_off00013440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13440 16492 bytes
SHA-256: 91e89029da44a91b5f8baeeae409c0a37bc170414561089f0760eed522264ce7
font_05_sfnt_off00014aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AA0 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f